1. Explain the details of different kinds of memories given in 8051 microcontroller.[16]

2. Give any four examples for program control flow instruction and explain. [4×4]

3. How do you provide the mechanism so that a
polled interrupt controller can receive two simultaneous interrupts in a
system? [16]

4. Describe with examples various modes of the 8051 timers. [16]

5. (a) Write an algorithm for sending ASCII codes
in a FIFO repeatedly upto maximum 32 times when a key is pressed for a
duration more than 200ms. Key is repeatdly passed every 200ms. Write
8051 assembly routine also
(b) Draw an interface for 3 scan lines and 5 return lines in a keypad. [8+8]

6. (a) Explain the importance of semaphores in multitasking system where task synchronization is achieved by this?
(b) What are the various mutex management function calls in RTOS [8+8]

7. (a) Explain IOCO and IOSO register for timer 1 in 80196
(b) what are the interrupt sources for synchronous serial
transmission and reception in 80196? What are the identification flags
and local enable bits for these sources? [8+8]

8. (a) Explain different data processing instructions in ARM 7 (with examples).
(b) What is Barrel shifter? How does it increase the speed of execution in ARM processor

Anna university Engineering Syllabus

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